The question showed up when we played yesterday:

What happens when a character with cybernetics suffers a critical hit that reduces his brawn-characteristic and therefore his cybernetics-treshold. Like a Character with 3 cybernetic implants and brawn 3 gets hit and his brawn-characteristic is reduced. There are no rules for what happens in this case. Does the character die, do the cybernetics cease to function or is just nothing happening at all?

And what happens if a characteristic is reduced to zero due to a critical hit?

make it narative as a malefunction due to the hard hit the person just got..

If the cybernetics give a special benefit this benefit will be inactive until the critical wound is healed / end of the encounter.

Doesn't the problem solve itself? Let's say that crit reduces his cybernetics-threshold. Since the cybernetic that has the crit isn't technically working, it shouldn't therefore count against his cybernetics-threshold until it's fixed, at which point everything will be fine.

A permanent loss means a permanent loss imo. Until they get their Brawn back up via Dedication, if the hit didn't take out the implant itself it's time to pick.

Special Modifications also has a cybernetic that allows you to increase your threshold.

I'm AFB, but doesn't it specify that a characteristic cannot drop below 1?